The GRACO 558321 is a metering nipple valve designed for use in GRACO 3900 Series equipment. It is a small, precision-engineered component typically made from durable materials suitable for industrial fluid handling. Its primary function is to regulate or meter fluid flow within GRACO spray foam or lubrication systems.

Key Features:

• Valve (Metering Nipple)
• 3900 Series, .60CC
• GRACO 3900 Series equipment
• Precision metering for accurate fluid control
• Compact size for easy integration into equipment
• Designed for reliability in demanding industrial environments

Applications:
Used in GRACO 3900 Series spray foam or lubrication systems for precise fluid metering and control.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, compatibility, and longevity of equipment.
• Ensure equipment is depressurized before installation
• Follow GRACO equipment manual for specific installation procedures
• Inspect for proper fit and secure attachment
• Regularly inspect for wear or damage
• Replace as part of routine maintenance to prevent leaks or flow issues
• Use only compatible replacement parts